.img-box{
  border: 1px solid #cecece;
  border-radius: 5px;
  overflow: hidden;
  position: relative;
  .cover-img{
    position: absolute;
    left: 0;
    top: 0;
    width: auto;
    height: auto;
  }
  img{
    width: 100%;
    height: 160px;
  }
  .img-name{
    text-align: center;
    margin: 0;
  }
  .opera{
    position: absolute;
    top: 0;
    left: 0;
    display: none;
    text-align: center;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0, .6);
    padding-top: 50px;
  }
  &:hover{
    .opera{
      display: block;
    }
  }

}